Method of producing seamless connections of the ends of metal wire gauze



March 24,' 1931. H. SCHUBERT 7 1,797,967

METHOD OF PRODUCING SEAMLESS CONNECTIONS OF THE ENDS OF METAL WIRE GAUZEFiled July 16, 1929 F492 Fi .6 7 3 7 3 F'gJ 7 v Hg. 7

//V VE N 7'01? Herman/2 Schubert A Nar /7251 Patented Mar. 24, 1931UNITED STATES PATENT OFFICE HERMANN SCHUBERT, OF WALDWEB K,NELB'N'IEKES, CZECHOSLOV'AKIA, ASSIGNOR TO THE FIRM F BUTTER 8cSCHBA'NTZ A. G., 0]! VIENNA, AUSTRIA METHOD OF PRODUCING SEAMLESS CONHEGTIORS OF THE ENDS OF METAL WIRE GAUZE Application filed July 16,1929, Serial No. 378,811, and in Austria September 17, 1928.

- I have filed applications in Austria on the 17th September, 1928, and1st July, 1929, Czechoslovakia on the 25th September, 1928, and Germanyon the 26th September, 1928.

5 This invention relates to a method of producing a seamless connectionof the ends of metal wire gauze particularly for paper-making machines.

In order to produce an endless metal wire gauze, particularly forpaper-making machines, it is necessary to connect both of its endseither by a seam or without the provision of a seam.

In order to produce-a seamless connection it has been proposed to slidethe warpmrire ends of-one gauze-end, after the removal of its end-weftwire, into the other gauze-end in such a manner, that the inserted warp-Wire ends are disposed alternately above and below the end-weft wire ofthe other gauzeend, and subsequently the warp-wire ends of bothgauze-ends are united with the common end-weft wire by welding orsoldering.

The ends of the gauze have to be opened by 2 a tool in order to permitthe insertion of the projecting inflected warp-wire ends of onegauze-end into the other gauze-end. This mode of opening the inflectedwarp-wire ends is very troublesome and takes up much time and further auniform opening of the inflected warp-wire ends is practically impossible so that, when sliding the ends onto the wire ends is sufiicientlywide and uniformly opened. In order to facilitate the opening it is ofadvantage to cut oif the warp-wire ends close to the end-weft wire whichis removed. This possesses the further favorable efect,

that the warp-wire ends, pushed onto and surrounding the end-weft wireof the other gauze-end, do not obstruct the openings of the mesh.

In order to prevent even the slightest projection of the inflectedwarp-wire ends of one gauze-end pushed onto the end-weft wire of theother gauze-end, beyond the gauze at the connecting place of thegauze-ends, it is of advantage .to roll down or depress the undulatedWarp-wire ends. Finally the warpwire ends at both sides arehard-soldered or welded to their common end-weft: wire.

The above object of preventingunevenness of the gauze at the place ofconnection can be attained in an improved Way in the following manner iThe end-weft wire of the one end of the gauze, onto which the projectinginflected warp-wire ends of the other end of the gauze are pushed, is ametal wire which is thinner and harder than the weft wire of theremaining gauze, while the end-weft wire of the other end of the gauze,which is removed, is

an ordinary weft wire.

In this manner the following effect is attained:

The warp-wire ends do not project beyond the gauze at any place aftertheir application, They can be pushed in a perfect manner onto theend-weft wire of the opposite gauze end, because the said end-weft wireis thinner than thevordinary weft-Wire and the resistance or strength ofthe connecting place is safeguarded in view of its greater hardness.After rolling down or depressing the applied inflected warp-wire ends onthis end-weft wire, the said warp-wire ends will be disposed in themetal wire gauze somewhat deeper than the other inflections of thegauze. Therefore the'metal wire gauze is subjected at the zone ofconnection to less wear than the other parts of the gauze.

If for instance the normal weft-wires consist of tombac while thewarp-wires are made of bronze, the end-weft wire of one gauze-endontowhich the warp-wire ends of the other gauze-end are pushed will be abronze-wire, which is substantially of the thickness of the warp-wireand thinner than thenormal weftwires of tombac.

Two modes of carrying out the present invention are illustrated by wayof example on the accompanying sheet of drawings in which- Figs. 1 and 2show in longitudinal section the ends of the gauze to be connected,withand without an end weft wire respectively;

Figs. 3 and 4 illustrate in longitudinal section and Ian viewrespectively the connected ends of t e gauze;

Figs. 5 to 8 are like views of a modified embodiment;

Figs. 5 and 6 show in longitudinal section the ends of the gauze to beconnected, with 3.113 without an end weft wire respectively; an

Figs. 7 and 8 illustrate in longitudinal section and plan viewrespectively the connected ends of the gauze.

The reference character 1 designates the warp-wires of one end of thegauze, 3 are the warp-wires of the other end of the gauze, 2 designatesthe last end weft-wire of one end of the gauze which remains in thelatter, and 4 the last end weft-wire of the other end of the gauze whichis removed. In the embodiment shown in Fig. 1, the end weft-wire 4 to beremoved is thicker and harder than the weft-wires of the other part ofthe gauze. In the embodiment illustrated in Figs. 5, 6 and 7, the endweft-wire 2 remaining in the gauze is thinner and harder than theweft-w1re of the other part of gauze. In Figs. 3 and 7, which illustratein longitudinal section the connected ends of the gauze, the referencecharacter 5 designates the places at which the ends of the warp-wires 3are pushed onto and soldered to the common end weft-wire 2.

I claim- The method of producing a seamless connection of the ends ofmetal wire gauze particularly for paper-making machines, which consistsin removing the end-weft wire at one end of the gauze, pushin theprojecting warp-wire ends onto the en -weft wire of the other end of thegauze so that they are disposed alternatel above. and'below the saidend-weft wire, t e said end-weft wire of the one end of the gauze, ontowhich the proj ecting inflected warp-wire ends of the other end of thegauze are pushed, being a metal wire which is thinner and harder thanthe weft wire of the remaining part of the gauze, while the endwveftwire to be removed at the other end of the gauze is an, ordinaryweft-wire, forcing down the said applied inflected Warp-wire ends ontothe thinner and harder end-weft wire, and subsequently firmly connectingthe warp-wire ends at both sides with this common end-weft wire.

In testimony whereof I aflix my signature.

HERMANN SCHUBERT.

